Patent Attorney
Vivien Chen Nielsen
Reg. No. 62514
Active
Not accepting new clients
Firm
Astellas US LLC
Astellas US LLC
Location
Northbrook, IL 60026
Northbrook, IL 60026
Phone
224-205-5225
224-205-5225
Registration Type
ATTORNEY
ATTORNEY
Roster
USPTO OED FY25
USPTO OED FY25
Firm and contact info reflects the FY25 roster (last updated September 25).
Attorneys may have changed firms since then — patent filings show their current firm of record.